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User:Frank Ellermann

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Today editing existing sequences is far simpler than it used to be in 2002 based on the tricky internal format : Find the sequence, log in with your OeisWiki account, click edit, update say a broken link, optionally add an edit comment, click submit, and some minutes later I got an e-mail that the proposed modification was approved by an associate editor. Actually I found the how to after the fact.

QR experimemt


Fun stuff

punch card

Three punched cards (3*80 columns) minus a space in column 72 (3*1), the vital card serial numbers in columns 73..80 (3*8) for a re-sort if you ever drop the deck, minus the internal format columns %S, %T, %U followed by a space (3*3) yields 204, or roughly 200 columns for comma separated terms if they happen to fit nicely in the remaining 3*68 columns.

In 2012 an editor changed it to 260 including spaces, five years before RFC 8140 was published. The OEIS corrupted the IETF. Joke off, I didn't submit a sequence for over a decade, and now I wasted 60 columns for more terms in A293308.

OEISwiki limitations

  • Instant commons is a mechanism introduced in 2011 permitting MediaWiki projects to import resources from WikiMedia commons. It is documented on the MediaWiki wiki. If you see a red link instead of an image below it does not yet work here:
  • For huge images the thumbnail generator fails miserably.
  • Embedded <rss> feeds are not supported here: could be interesting to find new pages added to commons:category:OEIS.
  • Wikidata is a pure WikiMedia project, unlike Instant commons, and this wiki needs no d: interwiki prefix for plain links to Wikidata. But Property:P829 (en: OEIS ID) is interesting.
  • Oddly <code> sucks everywhere (WikiMedia, …) and forces me to use <code style="font:smaller monospace"> or similar <small><code> kludges, but at the moment (2010…2018) a simple <code> is good enough here.
  • Syntax highlighting with <source lang="matlab"> is not yet installed: <source lang="rexx">numeric digits 500; say digits()</source>
  • The list of supported media types for Special:Upload does not yet include any video type, notably .ogv and WebM (VP8 or VP9 video with Vorbis or OPUS audio) are not yet allowed. JFTR, the upload size limit is 2 MB.
  • The CC-BY-NC license used here is incompatible with the commons CC-BY-SA limits — whatever that means (IANAL), see my commons page hosted by Google.
  • The short version of the OEIS movie available on YouTube cannot be embedded on OeisWiki pages, because
    1. I got no permission to upload it as .ogv to commons due to the license incompatibility (see above),
    2. without InstantCommons that would anyway not help here (see above), but might be nice on Wikipedia(s),
    3. it also cannot be uploaded here — the 998KB are okay, but video MIME types are not allowed (see above),
    4. the short version apparently does not yet exist on the OEIS proper (the pages above the OEIS wiki), and…
    5. even if it existed on OEIS proper the OEIS wiki would treat it like any external  file and refuse to display it.
  • As of December, 2018 the oldest secure legacy LTS MediaWiki version was 1.27.5 (September), anything older is insecure. This Wiki is at version 1.30.0.